Andreas gulbrandsen hovde



(No Model.)

A. G. HOVDE.

LAMP EXTINGUISHER.

N0. 390,970,. PatentedOGt. 9, 1888.

'- Nita STATES PATENT rrrca,

ANDREAS GULBRANDSEN HOVDE, OF HNEFOS, NORl/VAY.

LAMP-EXTlNGUlSl-IER.

SPECIFICATION forming part of Letters Patent No. 390,970, dated October 9, 1888.

Application filed February 23, 1888. Serial No. 26-l,llflfl.' (No model.)

To all whom it may concern:

Be it known that I, ANDREAS GULBRANDSEN HOVDE, a citizen of the Kingdom of Norway, residing at HonefosNorway, have invented certain newand useful ImproVementsinLamp-Extinguishers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to that class of lampextinguishers in which a blast of air is forced across the upper edge of the wicktuloe. In these lamp-extinguishers the blast of air is produced by means of apiston operating in a suitable cylinder connected with an airduct that terminates at the upper edge of the \vicktube, and is bent over to direct the blast across said tube. This construction and arrangement presents, however, disadvantages, in thatitis not applicable to a cylindrical burner unless, as hereinafter described, means are provided to distribute the blast or air-current in radial directions from a duct arranged axially within the wiclrtube.

The further disadvantage in the construction referred to lies in the fact that in lamps having large wick-tubes the flame is not extinguished, and this not by reason of an insufficiency in the volume of air forced across the wick-tube, but by reason of the sluggishness of such air-current.

The object of my invention is to avoid these disadvantages by providing means applicable to all styles of burners by properly directing the air-currents, and especially by employing devices that will produce a very sharp and sudden concussion in the air chamber or duct, so as to induce a current of air ofgreat velocity across the wick-tube, either from or to the airduct; and to these ends the invention consists, essentially, in the means employed for extinguishing the lamp and in structural features and combinations of parts, substantially as hereinafter fully described, and as set forth in the claims.

Referring to the accompanying drawings, Figure 1 is an axial section of so much of a lamp-burner as will be necessary to illustrate my invention in its application to alainp provided with a cylindrical wick-tube. Fig. 2 is a like view of the upper end of the wick-tube, illustrating a modified arrangement of the blast-distributer. Fig. 3 is a section of one form of elastic plate for producing the concussions or impulses in the body of air within the wick-tube. Fig. 4 is a section of a portion of the wick-raising spindle, showing the elastic disk or plate in a position the reverse of that of the air-duct shown in Fig. 6, in which a flat elastic plate is employed.

Referring to Fig. l, T indicates the wicktube, in which is formed an air-duct, a, that extends axially for a portion of its length along the wielrtube and terminates at or near the upper edge of said tube. Vis a dislcvalve, that is seated loosely on the upper end of duct a, its stem v projecting into said tube, so as to properly guide it in its movements to and from its seat. S is the wick-raising spindle, that carries,as usuahthe toothed raising wheel or wheels XV. The said spindleS is hollow and has its bearings at its inner end in one of the walls of the duct a. The outer end of the spindle S has a chambered head or button, S", which is secured a convex elastic metallic disk, D. By makingthe wick-raisingspindle hollow and locating the elastic metallic disk in the head thereof the construction of the extinguishing devices is materially simplified. It is obvious that when sufficient pressure is applied to the disk D it will yield suddenly and collapse, or become inverted, thereby producingasudden sharp concussion in the body of air within the duct a, that will produce a strong, sharp, and rapid impulse in said air. The air will lift the valve V, and as said valve is a disk-valve the air will be deflected radially thereby across the upper circumference of the wick-tube and the flame will be extinguished. The reverse will take place by reversing the ICO motion of the disk D, or when said disk is arranged reversely, as shown in Fig. I-that is to say, the air, instead of being forced out of the duct a, will be drawn into the samein which case the valve V cannot be used; but a disk may in this case be connected to the duct, as shown in Fig. 2, the disk being pro vided with a push-and-pull button, (I, so that impulses alternating in direction may be produced by the same disk, as will be readily understood, said disk operating asa suction and forcing device.

In order to obtain the sudden collapse or inversion and the return to its normal position of the disk D, I give it the form of asegment of a sphere.

The principle upon which is based the re sistance to pressure of a hollow spherical body is well known, and to increase the resistance of the disk and correspondingly increase the rapidity of the change of form under pressure, I give to said disk the form of a segment of a sphere. This form also offers a further advantage in that the disk does not completely collapse, but only a portion thereof, under a given pressure, as shown in dotted lines in Fig. 3. The same result may be obtained by means of a fiat elastic plate, P, of sufficient rcsilient power, as shown in Figs. 8 and 9.

In Fig. 6 I have shown the extinguishing devices applied to a flat wick-tube, the duct being arranged on the narrow side of the wick tube; but it may be arranged on the wider side of said tube by correspondingly increasing the width of the duct a. The air in this construe tion is directed and deflected by a lip or plate, a, extending across the month of the duct a, as shown.

In Figs. 5 and 7 I have shown the disk D applied directly to the air-duct. Instead of manipulating the disk by direct pressure or by means of a push or pull .rod or button, it may be done by means of" a lever operating on the disk or on a rod or stem connected therewith, thelever being pivoted at any convenient point of the burner.

Having now described my invention, what I claim is 1. In a lamp, the combination,with the wick tube, of an air-duct, avalve, and an air-forcing device closing the opposite ends of the duct, said valve being arranged to deflect the air across the upper edge of the wicletube, sub stantially as and for the purposes specified.

2. In a lamp, the combination,with the wicktube, of an air-duct terminating near the upper edge of said tube, a valve at said end of the duct, and an air-forcing device consisting of a resilient metallic plate or disk at the opposite end of the air-duct, substantially as and for the purposes specified.

3. In a lamp, the eombinatiou,with the wicktube, of an air-duet terminating near the up per edge of said tube, a disk-valve loosely seated on said end of the duct, and an air-forcing device consisting of a collapsible metallic disk having the form of a segment of a sphere applied at the opposite end of the air-duct, substantially as and for the purposes specified.

4. In a lamp, the combination,with the wicktube, of an air-duct terminating near the upper edge of said tube, a tubular wick-raising spindle forming a continuation of said duct, and an air-forcing device connected with the wick-raising spindle, substantially as and for the purposes specified.

5. In a lamp, the combination, with the wicktube, of an air-duct terminating near the upper edge of said tube, a tubular wick-raising spindle forming a continuation of the airduct, and an air-forcing device comprising a col lapsible diaphragm arranged in the wick-raising spindle, substantially as and for the purposes specified.

6. In a lamp, the combinatiomwitlr the wick tube, of an air-duct arranged axially in and terminating near the upper edge of said tube, a disk-valve seated loosely in said end of the air-duct, a hollow wicleruising spindle forming a continuation of" the ainduct, and an ain forcing device connected with said spindle,sub stantially as and for the purposes specified.

In testimony whereof I. affix my signature in presence of two witnesses.

ANDREAS ClUhllltlNllSliJ llOVllll.

Witnesses:

Gnnu'. GADE, ALFRED J. BR'YN. 

